WebStorm 9.0.2 Help

Keymap:

Adding Files To a Local Mercurial Repository

After a Mercurial repository for a project is initialized, you need to add the project data to it:

If you have specified Mercurial as the version control system for your project in the Settings
dialog box, tab Version Control,
WebStorm suggests to put each new file under Mercurial control during the file creation.